No. 173, in Supreme Court of United States, Oct. term, 1949, United States and Interstate Commerce Commission v. Denver and Rio Grande Western Railroad Company, Union Pacific Railroad Company, and American Smelting & Refining Company; [same] v. United States Smelting, Refining and Mining Company, Denver and Rio Grande Western Railroad Company, and Union Pacific Railroad Company, on appeal from district court for district of Utah, central division; brief for Interstate Commerce Commission.